"The Ghost" - Injustice: Gods Among Us: Arcade Ending: The Flash

With the One-Earth Regime broken and leaderless, now that Superman had been banished to the Phantom Zone, The Flash was left with two choices; to atone for all the atrocities he had committed as a member of the Regime, or go into hiding, as many of his former allies had done. He chose the latter, exiling himself from the public eye in an attempt to outrun his past.  

Yet Barry quickly found he could not stand by and let injustice run rampant in Central City while he had the power to stop it. Using his super-speed, he would zip in and out of crime scenes, before disappearing without a trace. 

Eyewitnesses to his actions would report seeing a red blur, leaving some to deduce his true identity. 

However, to others, he would simply be known as "The Ghost," earning respect and gratitude from the citizens of his hometown.

While these actions could in no way rewrite the sins of his past, he felt it was at least the start of his atonement.